FIELD: power engineering, chemical engineering, metallurgy, aeronautical engineering, gas industry, manufacture of pumps. SUBSTANCE: gas-turbine plant includes compressor, turbine and aerodynamic labyrinth screw seals having helical passages of opposite direction made on surface mounted at radial clearance in casings of compressor and turbine on shaft. Seals are of active type; their helical passages are located on inner surfaces of stator rings and on outer surfaces of rotor rings. Geometrical parameters, forms and sizes of threads are stipulated in invention. EFFECT: increased power and productivity of plant. 11 cl, 12 dwg
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